静态周向总温与总压组合畸变通过轴流压气机单转子时的传递

在文献4]的基础上,文中对静态周向总温与总压畸变的两种组合情况进行了研究:1.同相位时,总温畸变度的变化对总压畸变衰减的影响;2.总温与总压畸变之间存在不同的相位角时对总压畸变衰减的影响。数值计算结果表明,进口总温畸变度的变化以及总温与总压畸变之间相位角的变化,都将引起出口总压分布的变化;当总温畸变与总压畸变反相位时,最不利于总压畸变的衰减。本文将计算结果和文献7]中的实验结果进行了定性比较,两者符合得较好。

PROPAGATION OF COMBINED STEADY CIRCUMFERENTIALTOTAL PRESSURE AND TEMPERATURE DISTORTIONTHROUGH AN AXIAL ROTOR

Although the effects of combined steady circumferential total pressure and temperature distortion on performance have been investigated analytically and experimentally in recent years, the other urgent problem concerning the interrelation between them in the process of propagation through an axial compressor (including multistage and two-spool axial compressor)has been somewhat neglected.On the basis of previous work (4) and the approach proposed by the authors in dealing with the distortion propagation, two cases of combined steady circumferential total pressure and temperature distortion are investigated, first, how the variation of the total temperature distortion amplitude influences the attenuation of the total pressure distortion under the conditions of no phase difference; second, how it does when there is phase difference between them.Numerical experiment and analysis show that the amplitude of the total temperature distortion and the phase angle between them have great influences upon the attenuation of the total pressure distortion, within a certain range of the total temperature amplitude, the existence of the total temperature distortion is expedient to the attenuation of the total pressure distortion. The worst case is when the two are just opposite in phase and the total temperature distortion amplifies the total pressure distortion instead of attenuating it.